Table 3

 Multivariate analysis (parametric exponential model) of risk factors for Mycobacterium tuberculosis infection, according to the selected definition of latent tuberculosis infection and tuberculin skin testing conversion

CovariatesHR (95% CI)p Value
*Reference category.
Sex
    Women*1
    Men0.99 (0.84 to 1.17)0.925
Workplace
    Medicine *1
    Administrative0.43 (0.03 to 6.42)0.544
    Outpatient1.10 (0.77 to 1.59)0.594
    Surgery1.59 (1.14 to 2.22)0.006
    Infectious diseases1.94 (1.50 to 2.49)0.000
    Laboratory2.84 (2.23 to 3.62)0.000
Occupation (work activity)
    Nursing workers*1
    Clerical workers1.08 (0.17 to 6.74)0.934
    Medical workers0.84 (0.75 to 0.93)0.001
    Social workers0.32 (0.17 to 0.62)0.001
Age (years)1.03 (1.00 to 1.05)0.046